package com.tanhua.server.service;


import cn.hutool.core.collection.CollUtil;
import com.tanhua.autoconfig.template.OssTemplate;
import com.tanhua.commons.utils.Constants;
import com.tanhua.dubbo.api.MovementApi;
import com.tanhua.dubbo.api.UserInfoApi;
import com.tanhua.model.domain.UserInfo;
import com.tanhua.model.mongo.Movement;
import com.tanhua.model.vo.ErrorResult;
import com.tanhua.model.vo.MovementsVo;
import com.tanhua.model.vo.PageResult;
import com.tanhua.server.exception.BusinessException;
import com.tanhua.server.interceptor.UserHolder;
import org.apache.commons.lang.StringUtils;
import org.apache.dubbo.config.annotation.DubboReference;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;
import java.io.IOException;
import java.util.*;
import java.util.stream.Collectors;

@Service
public class MovementsService {

    @Autowired
    private OssTemplate ossTemplate;

    @DubboReference
    private MovementApi movementApi;

    @DubboReference
    private UserInfoApi userInfoApi;

    @Autowired
    private RedisTemplate<String,String> redisTemplate;
    /*
    * 发布动态
    * */
    public void publishMovement(Movement movement, MultipartFile[] imageContent) throws IOException {
        //1、判断发布动态的内容是否存在
        if (StringUtils.isEmpty(movement.getTextContent())){
            throw new BusinessException(ErrorResult.contentError());
        }
        //2、获取用户id
        Long userId = UserHolder.getUserId();
        //3、上传文件
        List<String> medias = new ArrayList<>();
        for (MultipartFile multipartFile : imageContent) {
            String upload = ossTemplate.upload(multipartFile.getOriginalFilename(), multipartFile.getInputStream());
            medias.add(upload);
        }
        //4、将数据封装到Movement对象
        movement.setUserId(userId);
        movement.setMedias(medias);
        //调用api完成发布动态
        movementApi.publish(movement);
    }


    /*
    * 查询个人动态
    * */
    public PageResult findByUserId(Long userId, Integer page, Integer pagesize) {
//        1、根据用户id，查询个人动态内容（PageResult--Movement）
        PageResult pr=movementApi.findByUserId(userId,page,pagesize);
//        2、获取PageResult中的item列表对象
        List<Movement> items = (List<Movement>) pr.getItems();
//        3、非空判断
        if (items==null){
            return pr;
        }
//        4、循环数据列表
        UserInfo userInfo = userInfoApi.findById(userId);
        List<MovementsVo> vos=new ArrayList<>();
        for (Movement item : items) {
//            5、一个movement构建一个Vo对象
            MovementsVo vo = MovementsVo.init(userInfo, item);
            vos.add(vo);
        }
//        6、构建返回值
        pr.setItems(vos);
        return pr;
    }

    /*
    * 查询好友动态
    * */
    public PageResult findFriendMovements(Integer page, Integer pagesize) {
//        1、获取当前用户的id
        Long userId = UserHolder.getUserId();
//        2.调用api查询好友发布的动态列表
        List<Movement> list=movementApi.findFriendMovements(page,pagesize,userId);
//        3、判断列表是否为空
        return getPageResult(page, pagesize, list);
    }

    private PageResult getPageResult(Integer page, Integer pagesize, List<Movement> list) {
        if (list==null ||list.isEmpty()){
            return new PageResult();
        }
//        4、提取动态发布人的id列表
        List<Long> userIds = CollUtil.getFieldValues(list, "userId", Long.class);
//        5.根据用户的id列表获取用户详情
        Map<Long, UserInfo> map = userInfoApi.findByIds(userIds,null);
//        6.一个Movement构造一个vo对象
        List<MovementsVo> vos=new ArrayList<>();
        for (Movement movement : list) {
            UserInfo userInfo = map.get(movement.getUserId());
            if (userInfo!=null){
                MovementsVo movementsVo = MovementsVo.init(userInfo, movement);
                //修复点赞bug，判断hashkey是否存在
                String key = Constants.MOVEMENTS_INTERACT_KEY + movement.getId().toHexString();
                String hashKey = Constants.MOVEMENT_LIKE_HASHKEY + UserHolder.getUserId();
                if (redisTemplate.opsForHash().hasKey(key,hashKey)){
                    movementsVo.setHasLiked(1);
                }
                String lovehashKey = Constants.MOVEMENT_LOVE_HASHKEY + UserHolder.getUserId();
                if (redisTemplate.opsForHash().hasKey(key,lovehashKey)){
                    movementsVo.setHasLoved(1);
                }
                vos.add(movementsVo);
            }
        }
//        7、构造PageResult并返回
        return new PageResult(page,pagesize,0L,vos);
    }

    //查询推荐动态
    public PageResult findrecommendMovements(Integer page, Integer pagesize) {
//        1、从redis获取推荐数据
        String redisKey = Constants.MOVEMENTS_RECOMMEND + UserHolder.getUserId();
        String redisValue = redisTemplate.opsForValue().get(redisKey);
//        2、判断推荐数据是否存在
        List<Movement> list = Collections.EMPTY_LIST;
        if (StringUtils.isEmpty(redisValue)){
    //        3、如果不存在，调用api随机构造10条动态数据
            list=movementApi.randomMovements(pagesize);
        }else {
    //        4、如果存在，处理pid数据
            String[] values = redisValue.split(",");
            //判断当前页的起始条数是否小于数组总数
            if ((page-1)*pagesize<values.length){
                List<Long> pids = Arrays.stream(values).skip((page - 1) * pagesize).limit(pagesize)
                        .map(e -> Long.valueOf(e))
                        .collect(Collectors.toList());
                //        5、调用api根据pid数组查询动态数据
                list = movementApi.findMovementsByPids(pids);
            }
        }
//        6、调用公共方法构造返回值
            return getPageResult(page,pagesize,list);
    }

    //查询单条动态
    public MovementsVo findById(String movementId) {
//        1.调用api根据id查询动态详情
        Movement movement=movementApi.findById(movementId);
//        2.转化vo对象
        if (movement!=null){
            UserInfo userInfo = userInfoApi.findById(movement.getUserId());
            return MovementsVo.init(userInfo,movement);
        }else {
            return null;
        }
    }
}
